KR20000055656A - Power take off control system - Google Patents

Abstract

PURPOSE: A power take off control system is provided to operate any additional mechanical devices as well as prevent erroneous operation of a power take off (PTO) during running of a vehicle by permitting a power take off control to be performed by means of an electronic engine control unit. CONSTITUTION: A power take off control system comprises a running information detecting device(20) for detecting various running information on operations of a brake pedal and a clutch pedal, an engine revolution frequency during running of a vehicle, a vehicle speed, and the like; a first PTO control switching device(10) mounted inside a cap of a special vehicle, which outputs signals for controlling operation of a PTO system and a revolution frequency of a PTO engine in response to a selection by a user; a second PTO control switching device(30) mounted outside the cap of a special vehicle, which outputs signals for controlling operation of a PTO system and a revolution frequency of a PTO engine in response to a selection by a user; an engine control device(40) for analyzing signals from the running information detecting device(20), the first PTO control switching device(10), and the second PTO control switching device(30) and then controlling outputs of a PTO system and an engine which supply a power for driving any additional mechanical apparatuses; a PTO magnetic valve(50) for drawing out a power of a transmission gear box in response to the signal from the engine control device and then supplying the power to the additional mechanical apparatuses; a fuel injection device(60) for regulating engine power in response to the signal from the engine control device; and engine revolution frequency display devices(71, 72) for perceivably displaying an engine revolution frequency, which is mounted inside and outside the cap of the special vehicle, respectively.

Description

Power take off control system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power take off ("PTO") system of a special vehicle, such as a mixer, a dump, and more specifically, mixing and dumping in a special vehicle. A PTO system for supplying power to drive additional machinery such as dumping.

In general, the PTO system is a device that draws power from the engine to drive the mixer, dump, and the like, which is an additional mechanism of a special vehicle, and is conventionally mounted on the transmission. When a user presses a clutch pedal and operates a PTO operation lever, The PTO magnetic valve acts to draw power from the transmission and use it for dumping or mixing special vehicles. At this time, the PTO engine speed is a mechanical system is adjusted as the user presses the accelerator pedal.

In the conventional PTO system, the user presses the accelerator pedal to increase the engine speed, and the increased engine torque enables dumping of a special vehicle, mixing of a mixer vehicle, and the like. Operation for operating the operation is inconvenient.

In addition, in the conventional PTO system, when the driver inadvertently manipulates the PTO operation lever during high-speed driving of the vehicle, malfunctions such as the deck of the dump vehicle are frequently raised due to the PTO is activated, thereby impairing the stability of the special vehicle.

The present invention has been made to solve the above problems, the object of which is to control the PTO-related control by the electronic engine control device to operate the additional mechanical device of the special vehicle with a simple switch operation and at the same time the vehicle This is to prevent PTO malfunction while driving.

1 is a configuration diagram schematically showing a power take off control system according to the present invention,

2 is a signal waveform diagram showing an operating state of a power take off magnetic valve by the power take off control system according to the present invention;

3 is a signal waveform diagram illustrating an engine output control state by the power takeoff control system according to the present invention.

In order to achieve the above object, the present invention includes a driving information detection means for detecting a variety of driving information, such as the brake pedal operation of the driver, the clutch pedal operation, the engine speed during the vehicle running, the vehicle speed; A first PTO control switching means installed in a cap of the special vehicle and outputting a signal for operating the PTO system and controlling the PTO engine speed according to a user's selection; A second PTO control switching means installed outside the cap of the special vehicle and outputting a signal for operating the PTO system and controlling the PTO engine speed according to a user's selection; An engine control device for controlling an engine output and a PTO system for supplying power for driving additional machinery of a special vehicle by analyzing signals of the driving information detecting means, the first PTO control switching means and the second PTO control switching means; A PTO magnetic valve operating in response to a signal from the engine control device to extract power from the transmission and to supply additional machinery of the special vehicle; A fuel injection device for controlling an engine output by adjusting a fuel injection timing, a fuel injection amount, etc. according to a signal of the engine control device; It is characterized in that it comprises an engine speed display means which is installed in the cap of the special vehicle, the outside, respectively, so that the driver can know the engine speed of the current vehicle.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a configuration diagram schematically showing a PTO control system according to the present invention, the first PTO control switching unit 10, the driving information detection unit 20, the second PTO control switching unit 30, the engine control device 40, The PTO magnetic valve 50, the fuel injection device 60, and the engine speed indicators 71 and 72 are comprised.

The first PTO control switching unit 10 is installed inside a cap of a special vehicle such as a mixer, a dump, and the like, and is switched at the will of the driver (user) to control the constant speed of the vehicle and to provide a power source for additional mechanical devices of the vehicle. A cruise / PTO switch 11 for outputting a signal for operating the PTO system for supply, and a SET / INC switch for outputting a signal for setting and increasing the engine speed by the PTO system, switched according to the driver's will. And a RES / DEC switch 13 for resetting and reducing the engine speed by the PTO system, which is switched according to the driver's will, and is switched according to the driver's will for the operation of the PTO system. Outputs a predetermined signal.

The driving information detection unit 20 includes a brake switch 21 switched according to the driver's brake pedal operation, a clutch switch 22 switched according to the driver's clutch pedal operation, and an engine rotation for detecting the engine speed during vehicle operation. It consists of the water sensor 23 and the vehicle speed sensor 24 which detects the vehicle speed at the time of driving a vehicle, and detects the various driving information during operation of a vehicle.

The second PTO control switching unit 30 is installed outside the cab of a special vehicle such as a mixer or a dump, respectively, and is switched according to the driver's intention to operate the PTO system to output a signal for operating the PTO system 31. ), An INC switch 32 that switches according to the driver's will and outputs a signal for increasing the engine speed by the PTO system, and switches to reduce the engine speed by the PTO system by switching according to the driver's will. It is composed of a DEC switch 33, and is switched in accordance with the driver's will for the operation of the PTO system to output a predetermined signal accordingly.

The engine controller 40 analyzes signals from the first PTO control switching unit 10, the driving information detection unit 20, and the second PTO control switching unit 30 to supply power to drive additional machinery of the special vehicle. To control the PTO system and engine output.

The PTO magnetic valve 50 operates according to the signal of the engine controller 40 to draw power from the transmission to power additional machinery of the special vehicle.

The fuel injection device 60 controls the engine output by adjusting the fuel injection timing, the fuel injection amount, and the like according to the signal of the engine controller 40.

The engine speed indicators 71 and 72 are installed inside and outside the cab of the special vehicle to display the driver's current engine speed.

The PTO control system according to the present invention configured as described above will be described with reference to FIGS. 2 and 3 according to an operation process thereof.

First, when the driver turns on the cruise / PTO switch 11 with the clutch pedal 22 turned on by pressing the clutch pedal in order to mix the mixer vehicle and dump the dump vehicle in the cab of the special vehicle, that is, in the driver's seat, The engine controller 40 determines whether the vehicle speed detected from the vehicle speed sensor 24 is equal to or less than the set PTO vehicle speed set value. At this time, the PTO magnetic valve 50 is not operated unless the vehicle speed detected as shown in FIG. 2 or FIG. 3 is less than or equal to the set PTO vehicle speed setting value, and even if the vehicle speed detected thereafter is less than or equal to the set PTO vehicle speed setting value. Not operating the valve 50 prohibits the operation of additional machinery in special vehicles such as mixers, dumps, and the like. In addition, when the cruise / PTO switch 11 on signal is applied by the driver's operation in a state where the detected vehicle speed is equal to or higher than the PTO vehicle speed set value, the engine control device 40 performs constant speed traveling control of the vehicle.

On the other hand, when the driver presses the clutch pedal and turns on the cruise / PTO switch 11 while the clutch switch 22 is turned on, if the vehicle speed detected from the vehicle speed sensor 24 is equal to or lower than the set PTO vehicle speed set value, Engine control unit 40 has a certain time delay ( 2, the PTO magnetic valve 50 is operated to transmit power from the transmission to a driving device for driving additional mechanical devices such as a mixer and a dump. At the same time, the engine control device 40 uses a fuel injection amount control or an ignition timing control through the fuel injection device 60 as shown in FIG. 3. After the delay, the engine speed is set to the preset PTO engine speed, so that the user can know the engine speed detected from the engine speed sensor 23 through the engine speed indicator 71 installed inside the cap. do. However, even when the vehicle speed detected from the vehicle speed sensor 24 is equal to or less than the set PTO vehicle speed set value, the driver turns on the cruise / PTO switch 11 without the clutch switch 22 on signal according to the driver's clutch pedal operation. In this case, the engine controller 40 does not operate the PTO magnetic valve 50 but also does not control the engine speed according to the PTO through the fuel injection device 60 control.

When the vehicle speed detected from the vehicle speed sensor 24 is equal to or less than the set PTO vehicle speed set value, the driver turns on the cruise / PTO switch 11 to operate the PTO magnetic valve 50 and the fuel injection device 60. By controlling the fuel injection device 60 such that the engine control device 40 sets the engine speed PTO by the PTO control for driving additional machinery such as a mixer and a dump. 40) controls the fuel injection device 60 only when the user presses the SET / INC switch 12 to gradually increase the engine speed by a set value, and the user toggles the SET / INC switch 12. When pressed, the engine control device 40 controls the fuel injection device 60 so that the engine speed is set to the PTO set engine speed. And, only when the user presses the RES / DEC switch 13, the engine control device 40 controls the fuel injection device 60 to gradually reduce the engine speed by a set value, and the user controls the RES / DEC switch 13 Toggle) and the engine control device 40 controls the fuel injection device 60 so that the engine speed is the PTO set engine speed.

When the user presses the brake or clutch pedal and the ON signal of the brake switch 21 or the clutch switch 22 is applied during the PTO control, the engine control device 40 controls the fuel injection device 60 to selectively The engine speed is returned to the PTO set engine speed (a in FIG. 3), or the adjusted PTO engine speed is maintained as it is without returning to the PTO set engine speed (b in FIG. 3).

In addition, when the user presses the accelerator pedal during the PTO control, the engine control device 40 controls the fuel injection device 60 to increase the engine speed, and when the user releases the foot, the engine speed is set to the PTO setting engine speed. Do not return, or increase the engine speed even when the user presses the accelerator pedal. At this time, when the engine speed is not increased according to the operation of the accelerator pedal, the engine controller 40 can adjust the engine speed only by the signals of the SET / INC switch 12 and the RES / DEC switch 13. Make sure

While performing the PTO control by the above method, even if the vehicle speed detected from the vehicle speed sensor 24 becomes equal to or higher than the PTO vehicle speed set value, the engine control device 40 continues to operate the PTO magnetic valve 50 and the fuel injection device 60 to control the engine speed to the PTO setting engine speed, and only when there is an off signal of the cruise / PTO switch 11, the engine control device 40 stops the operation of the PTO magnetic valve 50 The fuel injection device 60 is controlled to stop the PTO engine speed control.

In this way, unlike when the user executes the PTO control inside the cab, when the user controls the PTO engine speed outside the cab, first, the vehicle speed detected by the vehicle speed sensor 24 inside the cab is the PTO vehicle speed set value. When the clutch pedal 22 is turned on by pressing the clutch pedal in the following state and the cruise / PTO switch 11 is turned on at the same time, the engine control device 40 may stop for a predetermined time ( After the delay, the PTO magnetic valve 50 is operated so that power is transmitted from the transmission to a drive for driving additional machinery such as a mixer and a dump, and the fuel injection device 60 is controlled to advance the engine speed. After setting the set PTO engine speed, the remote PTO switch 31 installed outside the cap is turned on.

Then, the engine control device 40 does not execute the PTO engine speed control through the fuel injection device 60 control even if the signals of the SET / INC switch 12 and the RES / DEC switch 13 inside the cap are applied. The PTO engine speed control is performed only by the signals of the INC switch 32 and the DEC switch 33 installed outside the cap, and the engine speed detected from the engine speed sensor 23 is installed outside the cap. The engine speed indicator 72 allows the user to know. In addition, the engine control device 40 does not execute the PTO engine speed control even when the user presses the accelerator pedal inside the cab.

Although the PTO control outside the cap has been described separately from the control inside the cap, the user or another user may change the remote PTO switch outside the cap while the user executes the PTO control inside the cap by the method described above. 31) even when the engine is turned on, the engine control device 40 controls the fuel injection device 60 only by the signals of the INC switch 32 and the DEC switch 33 outside the cab to rotate the PTO engine. Allow for numerical control.

As described above, the present invention improves the driver's convenience because the PTO control for the dumping or mixing of a special vehicle is performed only by the switch operation, and improves the stability of the operation by suppressing the occurrence of malfunctions such as dumping while driving. By controlling fuel injection amount and injection timing, it is possible to solve the exhaust gas problem and improve fuel economy.

Claims (9)

Driving information detecting means for detecting various types of driving information such as a brake pedal operation of the driver, a clutch pedal operation, an engine speed while driving the vehicle, and a vehicle speed; A first PTO control switching means installed in a cap of the special vehicle and outputting a signal for operating the PTO system and controlling the PTO engine speed according to a user's selection; A second PTO control switching means installed outside the cap of the special vehicle and outputting a signal for operating the PTO system and controlling the PTO engine speed according to a user's selection; An engine control device for controlling an engine output and a PTO system for supplying power for driving additional machinery of a special vehicle by analyzing signals of the driving information detecting means, the first PTO control switching means and the second PTO control switching means; A PTO magnetic valve operating in response to a signal from the engine control device to extract power from the transmission and to supply additional machinery of the special vehicle; A fuel injection device for controlling an engine output by adjusting a fuel injection timing, a fuel injection amount, etc. according to a signal of the engine control device; And an engine speed display means installed in the cab of the special vehicle, the outside of the special vehicle to display the driver so that the driver can know the engine speed of the current vehicle. The cruise / PTO switch according to claim 1, wherein the first PTO switching means is switched at the user's will and outputs a signal for operating a PTO system for controlling the constant speed of the vehicle and supplying a power source of additional machinery of the vehicle. Wow; A SET / INC switch which is switched at the driver's will and outputs a signal for setting and increasing the engine speed by the PTO system; And a RES / DEC switch which switches at the driver's will and outputs a signal for resetting and reducing the engine speed by the PTO system. 2. The apparatus of claim 1, wherein the second PTO switching means comprises: a remote PTO switch switched according to the user's will and outputting a signal for operating the PTO system; An INC switch which is switched at the driver's will and outputs a signal for increasing the engine speed by the PTO system; And a DEC switch which is switched at the driver's will and outputs a signal for reducing the engine speed by the PTO system. 4. The engine control apparatus according to any one of claims 1 to 3, wherein the engine control device detects that when the user presses the clutch pedal and the cruise / PTO switch is turned on while the detected vehicle speed is equal to or less than the PTO set vehicle speed value, And operating the PTO magnetic valve and controlling a fuel injection device to control the engine speed to the PTO set engine speed. The fuel control apparatus of claim 4, wherein the engine control device controls the fuel injection value according to the SET / INC switch signal to increase the PTO engine speed stepwise by a set value, and fuel injection according to the toggle signal of the SET / INC switch. Control the device so that the PTO engine speed becomes the PTO set engine speed, and control the fuel injection value according to the RES / INC switch signal to lower the PTO engine speed by a set value step by step, And a PTO engine speed to be the PTO set engine speed by controlling the fuel injection value according to the toggle signal. 6. The system of claim 5, wherein the engine control device executes the PTO engine speed control only by the INC switch and the DEC switch outside the cap when the remote PTO switch signal is applied. . The apparatus of claim 6, wherein the engine control device does not stop the PTO engine speed control even when the vehicle speed is equal to or higher than the PTO vehicle speed setting value during the PTO engine speed control, and the off signal of the cruise / PTO switch by the user is Stopping the operation of the PTO magnetic valve only when there is, and stopping the PTO engine speed control through the fuel injection device. The engine control apparatus of claim 7, wherein the engine controller controls the fuel injection value when the user presses the brake or clutch pedal to control the PTO engine speed to the PTO set engine speed or to adjust the PTO engine speed currently adjusted. And a power take off control system. The engine control apparatus of claim 8, wherein the engine controller increases the PTO engine speed when the user presses the accelerator pedal, and when the user releases the foot, the engine controller returns to the PTO engine speed or releases the PTO engine according to the user's operation of the accelerator pedal. A power take off control system, characterized in that no control is executed.